Mounting for rotary cutters.



No. 662,9I4.

Patented Dec. 4, |900. H. L. CASAVANT.

MOUNTING FDR ROTARY CUTTBS.

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HERBERT LEONARD OASAVANT, OF LYNN, MASSACHUSETTS. ASSGNOR OF ONE-HALE TO GEORGE 7. OASAVANT, OF SAME PLACE.

MOUNTING FOR ROTAY CUTTEHS.

SPECKFICATION forming part of Letters Patent No. 662,914. dated December 4:, 1900.

s Application led March l5, 1899 Serial No. 709,130. (No model.)

To UJZZ whom it may concern: to do so without making any radical change Be it known that I, HERBERT LEONARD in existing machines as the magnitude of the OASAVANT, a citizen of the United States, resaving to be effected is not sufficient to warsiding at Lynn, in the county of Essex and rent the purchase of new machines by the 5 Stateof Massachusetts, haveinvented certain manufacturer, and it is further very desir- 55 new and useful Improvements in Sole and able to remedy the difficulty without inter- Heel TrimmingMachinesforBootsandShoes, fering to any considerable extent with the of which the following is a specification, refuse of the machines. By the employment of erence being had therein to the accompanymy invention the defect above noted may be Io ing drawings. remedied withoutchanging the machines now 6o My invention has for its object an improvein use and without stopping the machine for ment in rotaryheel orsole trimming machines any longer time than is now llecessary to take for boots or shoes, lt is fully set forth in the olf a cutter and substitute a diiferent one, following' description, and the novel features and as it is necessary to change the cutters thereof are pointed out and clearlydelined in from time to time, as previously explained, 65 the claim at thelclose of this specification. my improvement may be adopted without In theaccompanyingdrawings,to which refv any greater loss of the use of the machine erenceis made in the said description, Figure than now occurs. My invention is, in fact, l is a side elevation of a cutter-head and conembodied in a simple attachment applicable zo nected parts embodying myinvention. Fig. to any rotary trimining-machine and will be 7o 2 is a View in vertical section of the parts fully understood from the following descripshownin Fig. l. Fig. 3 isa view, partlyin section, reference being had to the accompanytionfof a cutter-head as now in common use, ing drawings. showing the cutter and means for securing The cuttershaft of the machine is shown the latter to the shaft. at l and is formed in the usual manner with 75 Many heel and sole trimming machines at a shoulder 2 and an end portion 3 of less dipresent in use are not provided with means ameter than the main portion of the shaft. for centering accurately the cutters when the As at present used the cutter is placed on the latter are placed on the cutter-carrying shafts part 8 against the shoulder 2 and secured 3o of such machines. The hole in the cutter is thereon rigidly, so as to turn with the shaft, 8o intended to t the shaft accurately and to be by means of a clamping disk or shield 21,(see so placed relatively to the cutter that the lat- Fig. 3,) through the center of which passes a ter when secured on the shaft will be concenheaded screw 22, which is screwed into a tric therewith and will run smoothly and threaded hole 4 inthe end of the shaft and evenly. In practice itis found that the procserves to clamp the disk or shield firmly 85 ess of tempering the cutters operates very against the cutter, as is well known to those frequently to distort the hole for the shaft, skilled in the art. My attachment embraces so that when the cutter is placed on the shaft a sleeve 5, which fits on the portion 3 of the and secured thereon itis uotconcentric therecuttershaft- The said sleeve is provided 4o with and will not run evenly and smoothly. with a head o, havinga central hole 7, through 9o To remedy this difficulty, it frequently is now which the screw S passes into the hole 4. The customary to grind the cutter after it is sescrew 8 may be the same as the screw 22, cured on the shaft until it runs true. This which passes through the disk or shield 21 is very destructive of the cutter, and as a (see Fig. 3) in the machines as now commonly largenumber of cutters are used on one shaft, constructed and as above described. Pro- 95 the cutters being in many cases frequently jecting outwardly from the head 6 is a hollow changed to produce soles and heels having arbor 9 of an outside diameter to fit as accuedges of different shapes, the expense resultrately as possible the hole in the cutter l0. l ing from this defect is considerable. To (See Fig. 2.) This arbor is split, as shown at l 5o remedy the defect practically, it is necessary ll, preferablyin `four places equidistant from roo each other, thus rendering` it possible to expand or spread the four quarters thus formed. The edges of these quarters are beveled, as at 12, and they are interiorly threaded, as shown at 28.' A plug 13, having its head beveled, as at 14, to correspond with the bevel 12, is provided, and after the cutter is placed on the arbor 9 the plug is screwed into the end of the arbor until the beveled head of the said plug engages the bevel-faces l2 of the split arbor. The further inward movement of the plug then operates to spread the arbor, forcing` it against the cutter, centering the latter accurately, and also serving to secure the said cutter to the shaft. The plug 13 is provided with a threaded hole centrally thereof of the same size preferably as the hole 4 in the shaft 1. The disk or shield 15 is then placed against the outer face of the cutter, as shown, Figs. l and 2, and a screw 16 is passed through the hole 17 in the center of the said disk and into the hole 1111 in the plug 13. By setting home the screw 16 the shield l5 is forced against the face of the cutter, clamping the latter between said shield or disk and the shoulder 18, formed by the head 6, thus holding the cutter rigidly in position.

The sleeve 5, its head 6, and the arbor 9 are preferably formed integral. These parts and the plug 13 and screw 16 are all that it is necessary to provide to embody my invention in' the machines as at present used.

As will be clear, my invention is inexpensive, may be quickly applied to existing machines, insures more even running of the cut# ters than can now be obtained without loss of time in truing them up, and effectually prevents the loss now sustained by the grinding away and consequent shortening ot' the life of the cutters which is now necessary to insure smooth and even running.

What I claim is- In a sole and heel trimming machine, the combination with The cutter-shaft having the reduced end and shoulder constituting` a cutter-seat, and the cutter, of the cutter-mounting comprising, essentially, the sleeve fitted upon said reduced end and provided with the expansible arbor receiving thereon the cutter, means to fix the said sleeve on the said reduced end, the plug` within the said arbor, the shield, and the screw passing through the said Ashield and taking into the said plug, substantially as described.

In testimony whereof I afx my signature in presence of two witnesses.

HERBERT LEONARD CASAVANT.

Witnesses:

SARAH RUTH, GEORGE W. CAsAvANT. 

